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annotate packages/compat/posix/current/src/pthread.cxx @ 115:6ed91473a1cd ecos-sw-2000-08-21

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Merge from eCos master repository on 2000-08-21-22:40:54-BST
author jlarmour
date Fri, 25 Aug 2000 17:32:38 +0000
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children 0c2b7be0d798
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115
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1 //==========================================================================
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2 //
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3 // pthread.cxx
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4 //
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5 // POSIX pthreads implementation
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6 //
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7 //==========================================================================
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8 //####COPYRIGHTBEGIN####
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9 //
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10 // -------------------------------------------
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11 // The contents of this file are subject to the Red Hat eCos Public License
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12 // Version 1.1 (the "License"); you may not use this file except in
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13 // compliance with the License. You may obtain a copy of the License at
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14 // http://www.redhat.com/
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15 //
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16 // Software distributed under the License is distributed on an "AS IS"
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17 // basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
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18 // License for the specific language governing rights and limitations under
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19 // the License.
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20 //
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21 // The Original Code is eCos - Embedded Configurable Operating System,
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22 // released September 30, 1998.
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23 //
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24 // The Initial Developer of the Original Code is Red Hat.
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25 // Portions created by Red Hat are
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26 // Copyright (C) 1998, 1999, 2000 Red Hat, Inc.
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27 // All Rights Reserved.
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28 // -------------------------------------------
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29 //
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30 //####COPYRIGHTEND####
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31 //==========================================================================
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32 //#####DESCRIPTIONBEGIN####
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33 //
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34 // Author(s): nickg
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35 // Contributors: nickg, jlarmour
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36 // Date: 2000-03-27
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37 // Purpose: POSIX pthread implementation
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38 // Description: This file contains the implementation of the POSIX pthread
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39 // functions.
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40 //
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41 //
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42 //
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43 //####DESCRIPTIONEND####
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44 //
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45 //==========================================================================
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46
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47 #include <pkgconf/hal.h>
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48 #include <pkgconf/kernel.h>
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49 #include <pkgconf/posix.h>
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50 #include <pkgconf/isoinfra.h>
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51
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52 #include <cyg/kernel/ktypes.h> // base kernel types
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53 #include <cyg/infra/cyg_trac.h> // tracing macros
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54 #include <cyg/infra/cyg_ass.h> // assertion macros
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55
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56 #include "pprivate.h" // POSIX private header
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57
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58 #include <stdlib.h> // malloc(), free()
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59
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60 #include <cyg/kernel/sched.hxx> // scheduler definitions
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61 #include <cyg/kernel/thread.hxx> // thread definitions
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62 #include <cyg/kernel/mutex.hxx> // mutex definitions
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63 #include <cyg/kernel/clock.hxx> // clock definitions
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64
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65 #include <cyg/kernel/sched.inl> // scheduler inlines
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66
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67 //-----------------------------------------------------------------------------
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68 // First check that the configuration contains the elements we need
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69
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70 #ifndef CYGPKG_KERNEL
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71 #error POSIX pthread need eCos kernel
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72 #endif
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73
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74 #ifndef CYGSEM_KERNEL_SCHED_MLQUEUE
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75 #error POSIX pthreads need MLQ scheduler
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76 #endif
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77
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78 #ifndef CYGSEM_KERNEL_SCHED_TIMESLICE
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79 #error POSIX pthreads need timeslicing
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80 #endif
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81
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82 #ifndef CYGVAR_KERNEL_THREADS_DATA
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83 #error POSIX pthreads need per-thread data
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84 #endif
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85
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86 //-----------------------------------------------------------------------------
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87 // Internal definitions
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88
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89 // Handle entry to a pthread package function.
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90 #define PTHREAD_ENTRY() CYG_REPORT_FUNCTYPE( "returning %d" )
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91
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92 // Handle entry to a pthread package function with no args.
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93 #define PTHREAD_ENTRY_VOID() CYG_REPORT_FUNCTION()
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94
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95 // Do a pthread package defined return. This requires the error code to be
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96 // returned as the result of the function. This also gives us a place to
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97 // put any generic tidyup handling needed for things like signal delivery
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98 // and cancellation.
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99 #define PTHREAD_RETURN(err) \
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100 CYG_MACRO_START \
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101 CYG_REPORT_RETVAL( err ); \
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102 return err; \
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103 CYG_MACRO_END
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104
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105 // A void variant of the above.
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106 #define PTHREAD_RETURN_VOID \
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107 CYG_MACRO_START \
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108 CYG_REPORT_RETURN(); \
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109 return; \
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110 CYG_MACRO_END
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111
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112 // Check that a pointer passed in as an argument is valid and return
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113 // EINVAL if it is not. This should be used to check pointers that are
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114 // required to be valid. Pointers that may optionally be NULL should
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115 // be checked within the function.
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116 #define PTHREAD_CHECK(ptr) if( (ptr) == NULL ) PTHREAD_RETURN(EINVAL);
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117
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118
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119 //=============================================================================
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120 // Internal data structures
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121
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122 // Mutex for controlling access to shared data structures
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123 Cyg_Mutex pthread_mutex CYGBLD_POSIX_INIT;
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124
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125 // Array of pthread control structures. A pthread_t object is
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126 // "just" an index into this array.
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127 static pthread_info *thread_table[CYGNUM_POSIX_PTHREAD_THREADS_MAX];
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128
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129 // Count of number of threads in table.
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130 static int pthread_count = 0;
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131
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132 // Count of number of threads that have exited and not been reaped.
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133 static int pthreads_exited;
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134
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135 // Count of number of threads that are waiting to be joined
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136 static int pthreads_tobejoined;
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137
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138 // Per-thread key allocation. This key map has a 1 bit set for each
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139 // key that is free, zero if it is allocated.
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140 #define KEY_MAP_TYPE cyg_uint32
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141 #define KEY_MAP_TYPE_SIZE (sizeof(KEY_MAP_TYPE)*8) // in BITS!
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142 static KEY_MAP_TYPE thread_key[PTHREAD_KEYS_MAX/KEY_MAP_TYPE_SIZE];
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143 static void (*key_destructor[PTHREAD_KEYS_MAX]) (void *);
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144
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145 // Index of next pthread_info to allocate from thread_table array.
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146 static int thread_info_next = 0;
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147
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148 // This is used to make pthread_t values unique even when reusing
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149 // a table slot. This allows CYGNUM_POSIX_PTHREAD_THREADS_MAX to range
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150 // up to 1024.
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151 #define THREAD_ID_COOKIE_INC 0x00000400
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152 #define THREAD_ID_COOKIE_MASK (THREAD_ID_COOKIE_INC-1)
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153 static pthread_t thread_id_cookie = THREAD_ID_COOKIE_INC;
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154
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155 //-----------------------------------------------------------------------------
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156 // Main thread.
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157
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158 static char main_stack[CYGNUM_POSIX_MAIN_DEFAULT_STACK_SIZE];
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159
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160 // Thread ID of main thread.
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161 static pthread_t main_thread;
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162
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163 //=============================================================================
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164 // Exported variables
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165
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166 int pthread_canceled; // pointed to by PTHREAD_CANCELED
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167
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168 //=============================================================================
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169 // Internal functions
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170
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171 //-----------------------------------------------------------------------------
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172 // Private version of pthread_self() that returns a pointer to our internal
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173 // control structure.
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174
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175 pthread_info *pthread_self_info(void)
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176 {
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177 Cyg_Thread *thread = Cyg_Thread::self();
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178
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179 CYG_CHECK_DATA_PTR(thread, "Illegal current thread");
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180
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181 pthread_info *info = (pthread_info *)thread->get_data(CYGNUM_KERNEL_THREADS_DATA_POSIX);
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182
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183 // CYG_CHECK_DATA_PTR(info, "Not a POSIX thread!!!");
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184
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185 return info;
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186 }
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187
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188 externC pthread_info *pthread_info_id( pthread_t id )
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189 {
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190 pthread_t index = id & THREAD_ID_COOKIE_MASK;
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191
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192 pthread_info *info = thread_table[index];
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193
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194 // Check for a valid entry
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195 if( info == NULL )
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196 return NULL;
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197
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198 // Check that this is a valid entry
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199 if ( info->state == PTHREAD_STATE_FREE ||
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200 info->state == PTHREAD_STATE_EXITED )
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201 return NULL;
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202
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203 // Check that the entry matches the id
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204 if( info->id != id ) return NULL;
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205
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206 // Return the pointer
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207 return info;
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208 }
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209
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210 //-----------------------------------------------------------------------------
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211 // new operator to allow us to invoke the Cyg_Thread constructor on the
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212 // pthread_info.thread_obj array.
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213
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214 inline void *operator new(size_t size, cyg_uint8 *ptr) { return (void *)ptr; };
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215
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216 //-----------------------------------------------------------------------------
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217 // Optional memory allocation functions for pthread stacks.
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218 // If there is an implementation of malloc() available, define pthread_malloc()
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219 // and pthread_free() to use it. Otherwise define them to do nothing.
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220 // In the future we may want to add configuration here to permit thread stacks
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221 // to be allocated in a nominated memory pool separate from the standard malloc()
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222 // pool. Hence the (currently redundant) encapsulation of these functions.
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223
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224 #if CYGINT_ISO_MALLOC
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225
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226 static __inline__ CYG_ADDRWORD pthread_malloc( CYG_ADDRWORD size )
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227 {
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228 return (CYG_ADDRWORD)malloc( size );
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229 }
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230
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231 static __inline__ void pthread_free( CYG_ADDRWORD m )
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232 {
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233 free( (void *)m );
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234 }
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235
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236 #define PTHREAD_MALLOC
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237
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238 #else
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239
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240 #define pthread_malloc(_x_) (0)
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241
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242 #define pthread_free(_x_)
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243
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244 #endif
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245
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246 //-----------------------------------------------------------------------------
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247 // pthread entry function.
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248 // does some housekeeping and then calls the user's start routine.
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249
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250 static void pthread_entry(CYG_ADDRWORD data)
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251 {
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252 pthread_info *self = (pthread_info *)data;
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253
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254 void *retval = self->start_routine(self->start_arg);
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255
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256 pthread_exit( retval );
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257 }
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258
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259 //-----------------------------------------------------------------------------
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260 // Main entry function.
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261 // This is set as the start_routine of the main thread. It invokes main()
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262 // and if it returns, shuts down the system.
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263
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264 externC void cyg_libc_invoke_main( void );
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265
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266 static void *call_main( void * )
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267 {
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268 cyg_libc_invoke_main();
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269 return NULL; // placate compiler
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270 }
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271
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272 //-----------------------------------------------------------------------------
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273 // POSIX ASR
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274 // This is installed as the ASR for all POSIX threads.
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275
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276 static void posix_asr( CYG_ADDRWORD data )
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277 {
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278 pthread_info *self = (pthread_info *)data;
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279
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280 // Call into timer subsystem to deliver any pending
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281 // timer expirations.
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282 cyg_posix_timer_asr(self);
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283
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284 // Call signal subsystem to deliver any signals
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285 cyg_posix_signal_asr(self);
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286
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287 // Check for cancellation
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288 if( self->cancelpending &&
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289 self->cancelstate == PTHREAD_CANCEL_ENABLE &&
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290 self->canceltype == PTHREAD_CANCEL_ASYNCHRONOUS )
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291 {
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292 // If we have a pending cancellation, cancellations are
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293 // enabled and we are in asynchronous mode, then we can do the
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294 // cancellation processing. Since pthread_exit() does
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295 // everything we need to do, we just call that here.
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296
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297 pthread_exit(PTHREAD_CANCELED);
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298 }
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299 }
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300
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301 //-----------------------------------------------------------------------------
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302 // The (Grim) Reaper.
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303 // This function is called to tidy up and dispose of any threads that have
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304 // exited. This work must be done from a thread other than the one exiting.
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305 // Note: this function _must_ be called with pthread_mutex locked.
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306
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307 static void pthread_reap()
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308 {
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309 int i;
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310
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311 // Loop over the thread table looking for exited threads. The
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312 // pthreads_exited counter springs us out of this once we have
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313 // found then all (and keeps us out if there are none to do).
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314
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315 for( i = 0; pthreads_exited && i < CYGNUM_POSIX_PTHREAD_THREADS_MAX ; i++ )
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316 {
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317 pthread_info *thread = thread_table[i];
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318
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319 if( thread != NULL && thread->state == PTHREAD_STATE_EXITED )
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320 {
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321 // The thread has exited, so it is a candidate for being
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322 // reaped. We have to make sure that the eCos thread has
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323 // also reached EXITED state before we can tidy it up.
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324
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325 while( thread->thread->get_state() != Cyg_Thread::EXITED )
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326 {
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327 // The eCos thread has not yet exited. This is
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328 // probably because its priority is too low to allow
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329 // it to complete. We fix this here by raising its
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330 // priority to equal ours and then yielding. This
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331 // should eventually get it into exited state.
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332
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333 Cyg_Thread *self = Cyg_Thread::self();
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334
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335 // Set thread's priority to our current dispatching priority.
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336 thread->thread->set_priority( self->get_current_priority() );
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337
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338 // Yield, yield
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339 self->yield();
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340
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341 // and keep looping until he exits.
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342 }
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343
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344 // At this point we have a thread that we can reap.
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345
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346 // destroy the eCos thread
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347 thread->thread->~Cyg_Thread();
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348
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349 // destroy the joiner condvar
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350 thread->joiner->~Cyg_Condition_Variable();
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351
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352 // Destroy signal handling fields
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353 cyg_posix_thread_sigdestroy( thread );
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354
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355 // Free the stack if we allocated it
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356 if( thread->freestack )
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357 pthread_free( thread->stackmem );
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358
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359 // Finally, set the thread table entry to NULL so that it
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360 // may be reused.
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361 thread_table[i] = NULL;
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362
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363 pthread_count--;
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364 pthreads_exited--;
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365 }
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366 }
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367 }
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368
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369 //=============================================================================
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370 // Functions exported to rest of POSIX subsystem.
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371
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372 //-----------------------------------------------------------------------------
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373 // Create the main() thread.
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374
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375 externC void cyg_posix_pthread_start( void )
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376 {
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377
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378 // Initialize the per-thread data key map.
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379
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380 for( cyg_ucount32 i = 0; i < (PTHREAD_KEYS_MAX/KEY_MAP_TYPE_SIZE); i++ )
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381 {
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382 thread_key[i] = ~0;
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383 }
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384
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385 // Create the main thread
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386 pthread_attr_t attr;
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387 struct sched_param schedparam;
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388
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389 schedparam.sched_priority = CYGNUM_POSIX_MAIN_DEFAULT_PRIORITY;
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390
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391 pthread_attr_init( &attr );
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392 pthread_attr_setinheritsched( &attr, PTHREAD_EXPLICIT_SCHED );
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393 pthread_attr_setstackaddr( &attr, &main_stack[CYGNUM_POSIX_MAIN_DEFAULT_STACK_SIZE] );
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394 pthread_attr_setstacksize( &attr, CYGNUM_POSIX_MAIN_DEFAULT_STACK_SIZE );
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395 pthread_attr_setschedpolicy( &attr, SCHED_RR );
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396 pthread_attr_setschedparam( &attr, &schedparam );
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397
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398 pthread_create( &main_thread, &attr, call_main, NULL );
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399 }
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400
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401 //-----------------------------------------------------------------------------
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402 // Look for a thread that can accept delivery of any of the signals in
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403 // the mask and release it from any wait it is in. Since this may be
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404 // called from a DSR, it cannot use any locks internally - any locking
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405 // should be done before the call.
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406
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407 externC void cyg_posix_pthread_release_thread( sigset_t *mask )
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408 {
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409 int i;
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410 int count = pthread_count;
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411
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412 // Loop over the thread table looking for a thread that has a
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413 // signal mask that does not mask all the signals in mask.
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414 // FIXME: find a more efficient way of doing this.
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415
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416 for( i = 0; count > 0 && i < CYGNUM_POSIX_PTHREAD_THREADS_MAX ; i++ )
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417 {
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418 pthread_info *thread = thread_table[i];
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419
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420 if( (thread != NULL) &&
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421 (thread->state == PTHREAD_STATE_RUNNING) &&
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422 ((*mask & ~thread->sigmask) != 0) )
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423 {
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424 // This thread can service at least one of the signals in
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425 // *mask. Knock it out of its wait and make its ASR pending.
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426
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427 thread->thread->set_asr_pending();
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428 thread->thread->release();
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429 break;
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430 }
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431
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432 if( thread->state != PTHREAD_STATE_FREE )
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433 count--;
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434 }
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435 }
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436
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437 //=============================================================================
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438 // General thread operations
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439
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440 //-----------------------------------------------------------------------------
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441 // Thread creation and management.
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442
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443 // Create a thread.
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444 externC int pthread_create ( pthread_t *thread,
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445 const pthread_attr_t *attr,
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446 void *(*start_routine) (void *),
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447 void *arg)
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448 {
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449 PTHREAD_ENTRY();
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450
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451 PTHREAD_CHECK(thread);
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452 PTHREAD_CHECK(start_routine);
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453
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454 pthread_info *self = pthread_self_info();
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455
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456 pthread_attr_t use_attr;
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457
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458 // Set use_attr to the set of attributes we are going to
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459 // actually use. Either those passed in, or the default set.
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460
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461 if( attr == NULL )
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462 pthread_attr_init( &use_attr );
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463 else use_attr = *attr;
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464
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465 // Adjust the attributes to cope with the setting of inheritsched.
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466
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467 if( use_attr.inheritsched == PTHREAD_INHERIT_SCHED )
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468 {
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469 use_attr.schedpolicy = self->attr.schedpolicy;
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470 use_attr.schedparam = self->attr.schedparam;
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471 }
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472
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473 CYG_ADDRWORD stackbase, stacksize;
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474 cyg_bool freestack = false;
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475 CYG_ADDRWORD stackmem = 0;
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476
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477 // If the stack size is not valid, we can assume that it is at
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478 // least PTHREAD_STACK_MIN bytes.
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479
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480 if( use_attr.stacksize_valid )
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481 stacksize = use_attr.stacksize;
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482 else stacksize = PTHREAD_STACK_MIN;
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483
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484 if( use_attr.stackaddr_valid )
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485 {
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486 // Set up stack base and size from supplied arguments.
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487
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488 // Calculate stack base from address and size.
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489 // FIXME: Falling stack assumed in pthread_create().
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490 stackmem = stackbase = (CYG_ADDRWORD)use_attr.stackaddr-stacksize;
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491 }
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492 else
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493 {
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494 #ifdef PTHREAD_MALLOC
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495
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496 stackmem = stackbase = pthread_malloc( stacksize );
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497
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498 if( stackmem == 0 )
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499 PTHREAD_RETURN( EAGAIN );
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500
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501 freestack = true;
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502 #else
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503 PTHREAD_RETURN(EINVAL);
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504 #endif
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505
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506 }
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507
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508 // Get sole access to data structures
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509
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510 pthread_mutex.lock();
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511
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512 // Dispose of any dead threads
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513 pthread_reap();
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514
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515 // Find a free slot in the thread table
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516
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517 pthread_info *nthread;
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518 int thread_next = thread_info_next;
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519
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520 while( thread_table[thread_next] != NULL )
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521 {
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522 thread_next++;
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523 if( thread_next >= CYGNUM_POSIX_PTHREAD_THREADS_MAX )
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524 thread_next = 0;
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525
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526 // check for wrap, and return error if no slots left
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527 if( thread_next == thread_info_next )
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528 {
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529 pthread_mutex.unlock();
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530 if( freestack )
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531 pthread_free( stackmem );
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532 PTHREAD_RETURN(ENOMEM);
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533 }
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534 }
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535
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536 nthread = (pthread_info *)stackbase;
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537
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538 stackbase += sizeof(pthread_info);
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539 stacksize -= sizeof(pthread_info);
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diff changeset
540
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541 thread_table[thread_next] = nthread;
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542
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diff changeset
543 // Set new next index
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diff changeset
544 thread_info_next = thread_next;
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diff changeset
545
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diff changeset
546 // step the cookie
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547 thread_id_cookie += THREAD_ID_COOKIE_INC;
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548
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549 // Initialize the table entry
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550 nthread->state = use_attr.detachstate == PTHREAD_CREATE_JOINABLE ?
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551 PTHREAD_STATE_RUNNING : PTHREAD_STATE_DETACHED;
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552 nthread->id = thread_next+thread_id_cookie;
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553 nthread->attr = use_attr;
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554 nthread->retval = 0;
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555 nthread->start_routine = start_routine;
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diff changeset
556 nthread->start_arg = arg;
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diff changeset
557
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558 nthread->freestack = freestack;
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559 nthread->stackmem = stackmem;
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560
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561 nthread->cancelstate = PTHREAD_CANCEL_ENABLE;
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562 nthread->canceltype = PTHREAD_CANCEL_DEFERRED;
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563 nthread->cancelbuffer = NULL;
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564 nthread->cancelpending = false;
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565
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566 nthread->thread_data = NULL;
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diff changeset
567
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diff changeset
568 #ifdef CYGVAR_KERNEL_THREADS_NAME
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diff changeset
569 // generate a name for this thread
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diff changeset
570
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571 char *name = nthread->name;
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572 static char *name_template = "pthread.00000000";
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573 pthread_t id = nthread->id;
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diff changeset
574
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575 for( int i = 0; name_template[i]; i++ ) name[i] = name_template[i];
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576
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577 // dump the id, in hex into the name.
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578 for( int i = 15; i >= 8; i-- )
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579 {
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580 name[i] = "0123456789ABCDEF"[id&0xF];
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581 id >>= 4;
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582 }
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583
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584 #endif
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585
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586 // Initialize the joiner condition variable
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587
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588 nthread->joiner = new(nthread->joiner_obj) Cyg_Condition_Variable( pthread_mutex );
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589
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590 // Initialize signal specific fields.
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591 cyg_posix_thread_siginit( nthread );
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592
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593 // create the underlying eCos thread
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594
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595 nthread->thread = new(&nthread->thread_obj[0])
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596 Cyg_Thread ( PTHREAD_ECOS_PRIORITY(use_attr.schedparam.sched_priority),
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597 pthread_entry,
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598 (CYG_ADDRWORD)nthread,
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599 name,
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diff changeset
600 stackbase,
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601 stacksize);
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602
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603 // Put pointer to pthread_info into eCos thread's per-thread data.
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604 nthread->thread->set_data( CYGNUM_KERNEL_THREADS_DATA_POSIX, (CYG_ADDRWORD)nthread );
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605
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diff changeset
606 // Set timeslice enable according to scheduling policy.
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diff changeset
607 if( use_attr.schedpolicy == SCHED_FIFO )
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608 nthread->thread->timeslice_disable();
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609 else nthread->thread->timeslice_enable();
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diff changeset
610
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diff changeset
611 // set up ASR and data
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612 nthread->thread->set_asr( posix_asr, (CYG_ADDRWORD)nthread, NULL, NULL );
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613
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614 // return thread ID
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615 *thread = nthread->id;
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616
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617 pthread_count++;
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618
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619 pthread_mutex.unlock();
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620
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621 // finally, set the thread going
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622 nthread->thread->resume();
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623
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624 PTHREAD_RETURN(0);
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625 }
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626
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627 //-----------------------------------------------------------------------------
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628 // Get current thread id.
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629
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630 externC pthread_t pthread_self ( void )
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631 {
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632 PTHREAD_ENTRY();
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633
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634 pthread_info *info = pthread_self_info();
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635
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636 CYG_CHECK_DATA_PTR(info, "Not a POSIX thread!!!");
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637
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638 return info->id;
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639 }
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640
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641 //-----------------------------------------------------------------------------
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642 // Compare two thread identifiers.
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643
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644 externC int pthread_equal (pthread_t thread1, pthread_t thread2)
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645 {
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646 PTHREAD_ENTRY();
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647
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648 return thread1 == thread2;
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649 }
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650
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651 //-----------------------------------------------------------------------------
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652 // Terminate current thread.
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653
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654 externC void exit(int) CYGBLD_ATTRIB_NORET;
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655
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656 externC void pthread_exit (void *retval)
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657 {
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658 PTHREAD_ENTRY();
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659
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660 pthread_info *self = pthread_self_info();
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661
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662 // Call cancellation handlers. We eat up the buffers as we go in
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663 // case any of the routines calls pthread_exit() itself.
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664 while( self->cancelbuffer != NULL )
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665 {
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666 struct pthread_cleanup_buffer *buffer = self->cancelbuffer;
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667
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668 self->cancelbuffer = buffer->prev;
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669
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670 buffer->routine(buffer->arg);
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671 }
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672
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673 if( self->thread_data != NULL )
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674 {
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675 // Call per-thread key destructors.
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676 // The specification of this is that we must continue to call the
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677 // destructor functions until all the per-thread data values are NULL or
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678 // we have done it PTHREAD_DESTRUCTOR_ITERATIONS times.
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679
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680 cyg_bool destructors_called;
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681 int destructor_iterations = 0;
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682
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683 do
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684 {
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685 destructors_called = false;
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686
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687 for( cyg_ucount32 key = 0; key < PTHREAD_KEYS_MAX; key++ )
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diff changeset
688 {
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689 // Skip unallocated keys
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690 if( thread_key[key/KEY_MAP_TYPE_SIZE] & 1<<(key%KEY_MAP_TYPE_SIZE) )
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691 continue;
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692
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693 // Skip NULL destructors
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694 if( key_destructor[key] == NULL ) continue;
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diff changeset
695
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696 // Skip NULL data values
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697 if( self->thread_data[key] == NULL ) continue;
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diff changeset
698
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699 // If it passes all that, call the destructor
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700 key_destructor[key]((void *)(self->thread_data[key]));
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701
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702 // Record that we called a destructor
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703 destructors_called = true;
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704 }
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705
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706 // Count the iteration
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707 destructor_iterations++;
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708
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709 } while( destructors_called &&
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710 (destructor_iterations <= PTHREAD_DESTRUCTOR_ITERATIONS));
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711
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712 }
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713
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714 pthread_mutex.lock();
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715
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716 // Set the retval for any joiner
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717 self->retval = retval;
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718
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719 // If we are already detached, go to EXITED state, otherwise
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720 // go into JOIN state.
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721
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722 if ( PTHREAD_STATE_DETACHED == self->state ) {
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diff changeset
723 self->state = PTHREAD_STATE_EXITED;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
724 pthreads_exited++;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
725 } else {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
726 self->state = PTHREAD_STATE_JOIN;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
727 pthreads_tobejoined++;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
728 }
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
729
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
730 // Kick any waiting joiners
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
731 self->joiner->broadcast();
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
732
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
733 cyg_bool call_exit=false;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
734
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
735 // if this is the last thread (other than threads waiting to be joined)
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
736 // then we need to call exit() later
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
737 if ( pthreads_exited + pthreads_tobejoined == pthread_count )
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
738 call_exit=true;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
739
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
740 pthread_mutex.unlock();
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
741
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
742 // Finally, call the exit function; this will not return.
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
743 if ( call_exit )
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
744 ::exit(0);
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
745 else
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
746 self->thread->exit();
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
747
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
748 // This loop keeps some compilers happy. pthread_exit() is marked
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
749 // with the noreturn attribute, and without this they generate a
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
750 // call to abort() here in case Cyg_Thread::exit() returns.
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
751
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
752 for(;;) continue;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
753 }
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
754
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
755 //-----------------------------------------------------------------------------
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
756 // Wait for the thread to terminate. If thread_return is not NULL then
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
757 // the retval from the thread's call to pthread_exit() is stored at
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
758 // *thread_return.
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
759
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
760 externC int pthread_join (pthread_t thread, void **thread_return)
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
761 {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
762 PTHREAD_ENTRY();
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
763
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
764 pthread_mutex.lock();
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
765
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
766 // Dispose of any dead threads
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
767 pthread_reap();
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
768
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
769 pthread_info *self = pthread_self_info();
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
770 pthread_info *joinee = pthread_info_id( thread );
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
771
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
772 if( joinee == NULL )
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
773 {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
774 pthread_mutex.unlock();
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
775 PTHREAD_RETURN(ESRCH);
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
776 }
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
777
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
778 if( joinee == self )
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
779 {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
780 pthread_mutex.unlock();
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
781 PTHREAD_RETURN(EDEADLK);
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
782 }
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
783
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
784 switch ( joinee->state )
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
785 {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
786 case PTHREAD_STATE_RUNNING:
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
787 // The thread is still running, we must wait for it.
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
788 while( joinee->state == PTHREAD_STATE_RUNNING )
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
789 joinee->joiner->wait();
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
790
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
791 // check that the thread is still joinable
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
792 if( joinee->state == PTHREAD_STATE_JOIN )
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
793 break;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
794
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
795 // The thread has become unjoinable while we waited, so we
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
796 // fall through to complain.
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
797
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
798 case PTHREAD_STATE_FREE:
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
799 case PTHREAD_STATE_DETACHED:
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
800 case PTHREAD_STATE_EXITED:
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
801 // None of these may be joined.
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
802 pthread_mutex.unlock();
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
803 PTHREAD_RETURN(EINVAL);
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
804
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
805 case PTHREAD_STATE_JOIN:
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
806 break;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
807 }
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
808
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
809 // here, we know that joinee is a thread that has exited and is
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
810 // ready to be joined.
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
811
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
812 // Get the retval
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
813
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
814 if( thread_return != NULL )
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
815 *thread_return = joinee->retval;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
816
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
817 // set state to exited.
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
818 joinee->state = PTHREAD_STATE_EXITED;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
819 pthreads_exited++;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
820 pthreads_tobejoined--;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
821
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
822 // Dispose of any dead threads
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
823 pthread_reap();
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
824
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
825 pthread_mutex.unlock();
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
826
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
827 PTHREAD_RETURN(0);
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
828 }
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
829
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
830 //-----------------------------------------------------------------------------
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
831 // Set the detachstate of the thread to "detached". The thread then does not
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
832 // need to be joined and its resources will be freed when it exits.
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
833
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
834 externC int pthread_detach (pthread_t thread)
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
835 {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
836 PTHREAD_ENTRY();
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
837
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
838 int ret = 0;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
839
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
840 pthread_mutex.lock();
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
841
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
842 pthread_info *detachee = pthread_info_id( thread );
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
843
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
844 if( detachee == NULL )
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
845 ret = ESRCH; // No such thread
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
846 else if( detachee->state == PTHREAD_STATE_DETACHED )
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
847 ret = EINVAL; // Already detached!
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
848 else
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
849 {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
850 // Set state to detached and kick any joinees to
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
851 // make them return.
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
852 detachee->state = PTHREAD_STATE_DETACHED;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
853 detachee->joiner->broadcast();
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
854 }
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
855
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
856 // Dispose of any dead threads
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
857 pthread_reap();
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
858
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
859 pthread_mutex.unlock();
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
860
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
861 PTHREAD_RETURN(ret);
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
862 }
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
863
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
864
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
865 //-----------------------------------------------------------------------------
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
866 // Thread attribute handling.
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
867
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
868 //-----------------------------------------------------------------------------
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
869 // Initialize attributes object with default attributes:
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
870 // detachstate == PTHREAD_CREATE_JOINABLE
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
871 // scope == PTHREAD_SCOPE_SYSTEM
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
872 // inheritsched == PTHREAD_INHERIT_SCHED
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jlarmour
parents:
diff changeset
873 // schedpolicy == SCHED_OTHER
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jlarmour
parents:
diff changeset
874 // schedparam == unset
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jlarmour
parents:
diff changeset
875 // stackaddr == unset
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jlarmour
parents:
diff changeset
876 // stacksize == 0
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jlarmour
parents:
diff changeset
877 //
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jlarmour
parents:
diff changeset
878
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
879 externC int pthread_attr_init (pthread_attr_t *attr)
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
880 {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
881 PTHREAD_ENTRY();
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jlarmour
parents:
diff changeset
882
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
883 PTHREAD_CHECK(attr);
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jlarmour
parents:
diff changeset
884
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
885 attr->detachstate = PTHREAD_CREATE_JOINABLE;
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jlarmour
parents:
diff changeset
886 attr->scope = PTHREAD_SCOPE_SYSTEM;
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jlarmour
parents:
diff changeset
887 attr->inheritsched = PTHREAD_INHERIT_SCHED;
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jlarmour
parents:
diff changeset
888 attr->schedpolicy = SCHED_OTHER;
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jlarmour
parents:
diff changeset
889 attr->schedparam.sched_priority = 0;
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jlarmour
parents:
diff changeset
890 attr->stackaddr_valid = 0;
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jlarmour
parents:
diff changeset
891 attr->stackaddr = NULL;
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jlarmour
parents:
diff changeset
892 attr->stacksize_valid = 0;
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jlarmour
parents:
diff changeset
893 attr->stacksize = 0;
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jlarmour
parents:
diff changeset
894
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jlarmour
parents:
diff changeset
895 PTHREAD_RETURN(0);
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jlarmour
parents:
diff changeset
896 }
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parents:
diff changeset
897
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jlarmour
parents:
diff changeset
898 //-----------------------------------------------------------------------------
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jlarmour
parents:
diff changeset
899 // Destroy thread attributes object
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jlarmour
parents:
diff changeset
900
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jlarmour
parents:
diff changeset
901 externC int pthread_attr_destroy (pthread_attr_t *attr)
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
902 {
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jlarmour
parents:
diff changeset
903 PTHREAD_ENTRY();
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
904
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
905 PTHREAD_CHECK(attr);
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jlarmour
parents:
diff changeset
906
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jlarmour
parents:
diff changeset
907 // Nothing to do here...
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jlarmour
parents:
diff changeset
908
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
909 PTHREAD_RETURN(0);
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jlarmour
parents:
diff changeset
910 }
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jlarmour
parents:
diff changeset
911
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
912 //-----------------------------------------------------------------------------
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jlarmour
parents:
diff changeset
913 // Set the detachstate attribute
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jlarmour
parents:
diff changeset
914
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jlarmour
parents:
diff changeset
915 externC int pthread_attr_setdetachstate (pthread_attr_t *attr,
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
916 int detachstate)
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jlarmour
parents:
diff changeset
917 {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
918 PTHREAD_ENTRY();
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
919
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jlarmour
parents:
diff changeset
920 PTHREAD_CHECK(attr);
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jlarmour
parents:
diff changeset
921
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
922 if( detachstate == PTHREAD_CREATE_JOINABLE ||
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
923 detachstate == PTHREAD_CREATE_DETACHED )
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
924 {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
925 attr->detachstate = detachstate;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
926 PTHREAD_RETURN(0);
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jlarmour
parents:
diff changeset
927 }
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
928
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jlarmour
parents:
diff changeset
929 PTHREAD_RETURN(EINVAL);
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jlarmour
parents:
diff changeset
930 }
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parents:
diff changeset
931
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
932 //-----------------------------------------------------------------------------
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jlarmour
parents:
diff changeset
933 // Get the detachstate attribute
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jlarmour
parents:
diff changeset
934 externC int pthread_attr_getdetachstate (const pthread_attr_t *attr,
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
935 int *detachstate)
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
936 {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
937 PTHREAD_ENTRY();
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jlarmour
parents:
diff changeset
938
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jlarmour
parents:
diff changeset
939 PTHREAD_CHECK(attr);
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jlarmour
parents:
diff changeset
940
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
941 if( detachstate != NULL )
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jlarmour
parents:
diff changeset
942 *detachstate = attr->detachstate;
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jlarmour
parents:
diff changeset
943
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
944 PTHREAD_RETURN(0);
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jlarmour
parents:
diff changeset
945 }
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parents:
diff changeset
946
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
947 //-----------------------------------------------------------------------------
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jlarmour
parents:
diff changeset
948 // Set scheduling contention scope
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parents:
diff changeset
949
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jlarmour
parents:
diff changeset
950 externC int pthread_attr_setscope (pthread_attr_t *attr, int scope)
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
951 {
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jlarmour
parents:
diff changeset
952 PTHREAD_ENTRY();
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jlarmour
parents:
diff changeset
953
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jlarmour
parents:
diff changeset
954 PTHREAD_CHECK(attr);
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jlarmour
parents:
diff changeset
955
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
956 if( scope == PTHREAD_SCOPE_SYSTEM ||
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jlarmour
parents:
diff changeset
957 scope == PTHREAD_SCOPE_PROCESS )
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
958 {
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jlarmour
parents:
diff changeset
959 if( scope == PTHREAD_SCOPE_PROCESS )
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jlarmour
parents:
diff changeset
960 PTHREAD_RETURN(ENOTSUP);
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jlarmour
parents:
diff changeset
961
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jlarmour
parents:
diff changeset
962 attr->scope = scope;
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jlarmour
parents:
diff changeset
963
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jlarmour
parents:
diff changeset
964 PTHREAD_RETURN(0);
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jlarmour
parents:
diff changeset
965 }
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jlarmour
parents:
diff changeset
966
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
967 PTHREAD_RETURN(EINVAL);
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
968 }
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jlarmour
parents:
diff changeset
969
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jlarmour
parents:
diff changeset
970 //-----------------------------------------------------------------------------
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jlarmour
parents:
diff changeset
971 // Get scheduling contention scope
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jlarmour
parents:
diff changeset
972
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
973 externC int pthread_attr_getscope (const pthread_attr_t *attr, int *scope)
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
974 {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
975 PTHREAD_ENTRY();
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
976
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
977 PTHREAD_CHECK(attr);
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jlarmour
parents:
diff changeset
978
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
979 if( scope != NULL )
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jlarmour
parents:
diff changeset
980 *scope = attr->scope;
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jlarmour
parents:
diff changeset
981
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
982 PTHREAD_RETURN(0);
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
983 }
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jlarmour
parents:
diff changeset
984
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
985 //-----------------------------------------------------------------------------
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jlarmour
parents:
diff changeset
986 // Set scheduling inheritance attribute
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jlarmour
parents:
diff changeset
987
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
988 externC int pthread_attr_setinheritsched (pthread_attr_t *attr, int inherit)
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
989 {
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jlarmour
parents:
diff changeset
990 PTHREAD_ENTRY();
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
991
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
992 PTHREAD_CHECK(attr);
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jlarmour
parents:
diff changeset
993
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
994 if( inherit == PTHREAD_INHERIT_SCHED ||
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jlarmour
parents:
diff changeset
995 inherit == PTHREAD_EXPLICIT_SCHED )
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
996 {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
997 attr->inheritsched = inherit;
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jlarmour
parents:
diff changeset
998
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
999 PTHREAD_RETURN(0);
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1000 }
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1001
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1002 PTHREAD_RETURN(EINVAL);
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1003 }
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1004
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1005 //-----------------------------------------------------------------------------
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1006 // Get scheduling inheritance attribute
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jlarmour
parents:
diff changeset
1007
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1008 externC int pthread_attr_getinheritsched (const pthread_attr_t *attr,
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1009 int *inherit)
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1010 {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1011 PTHREAD_ENTRY();
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1012
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1013 PTHREAD_CHECK(attr);
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jlarmour
parents:
diff changeset
1014
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1015 if( inherit != NULL )
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1016 *inherit = attr->inheritsched;
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jlarmour
parents:
diff changeset
1017
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1018 PTHREAD_RETURN(0);
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1019 }
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
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diff changeset
1020
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1021 //-----------------------------------------------------------------------------
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jlarmour
parents:
diff changeset
1022 // Set scheduling policy
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parents:
diff changeset
1023
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parents:
diff changeset
1024 externC int pthread_attr_setschedpolicy (pthread_attr_t *attr, int policy)
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jlarmour
parents:
diff changeset
1025 {
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jlarmour
parents:
diff changeset
1026 PTHREAD_ENTRY();
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jlarmour
parents:
diff changeset
1027
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parents:
diff changeset
1028 PTHREAD_CHECK(attr);
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parents:
diff changeset
1029
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parents:
diff changeset
1030 if( policy == SCHED_OTHER ||
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jlarmour
parents:
diff changeset
1031 policy == SCHED_FIFO ||
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jlarmour
parents:
diff changeset
1032 policy == SCHED_RR )
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jlarmour
parents:
diff changeset
1033 {
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diff changeset
1034 attr->schedpolicy = policy;
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parents:
diff changeset
1035
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parents:
diff changeset
1036 PTHREAD_RETURN(0);
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jlarmour
parents:
diff changeset
1037 }
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jlarmour
parents:
diff changeset
1038
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jlarmour
parents:
diff changeset
1039 PTHREAD_RETURN(EINVAL);
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jlarmour
parents:
diff changeset
1040 }
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parents:
diff changeset
1041
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parents:
diff changeset
1042 //-----------------------------------------------------------------------------
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parents:
diff changeset
1043 // Get scheduling policy
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parents:
diff changeset
1044
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diff changeset
1045 externC int pthread_attr_getschedpolicy (const pthread_attr_t *attr,
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diff changeset
1046 int *policy)
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parents:
diff changeset
1047 {
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parents:
diff changeset
1048 PTHREAD_ENTRY();
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parents:
diff changeset
1049
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diff changeset
1050 PTHREAD_CHECK(attr);
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jlarmour
parents:
diff changeset
1051
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diff changeset
1052 if( policy != NULL )
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diff changeset
1053 *policy = attr->schedpolicy;
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diff changeset
1054
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diff changeset
1055 PTHREAD_RETURN(0);
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parents:
diff changeset
1056 }
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diff changeset
1057
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diff changeset
1058 //-----------------------------------------------------------------------------
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parents:
diff changeset
1059 // Set scheduling parameters
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diff changeset
1060 externC int pthread_attr_setschedparam (pthread_attr_t *attr,
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diff changeset
1061 const struct sched_param *param)
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parents:
diff changeset
1062 {
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diff changeset
1063 PTHREAD_ENTRY();
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diff changeset
1064
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diff changeset
1065 PTHREAD_CHECK(attr);
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parents:
diff changeset
1066 PTHREAD_CHECK(param);
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diff changeset
1067
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diff changeset
1068 attr->schedparam = *param;
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parents:
diff changeset
1069
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diff changeset
1070 PTHREAD_RETURN(0);
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parents:
diff changeset
1071 }
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diff changeset
1072
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diff changeset
1073 //-----------------------------------------------------------------------------
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parents:
diff changeset
1074 // Get scheduling parameters
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parents:
diff changeset
1075
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diff changeset
1076 externC int pthread_attr_getschedparam (const pthread_attr_t *attr,
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jlarmour
parents:
diff changeset
1077 struct sched_param *param)
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jlarmour
parents:
diff changeset
1078 {
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diff changeset
1079 PTHREAD_ENTRY();
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jlarmour
parents:
diff changeset
1080
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parents:
diff changeset
1081 PTHREAD_CHECK(attr);
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diff changeset
1082
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diff changeset
1083 if( param != NULL )
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parents:
diff changeset
1084 *param = attr->schedparam;
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parents:
diff changeset
1085
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jlarmour
parents:
diff changeset
1086 PTHREAD_RETURN(0);
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jlarmour
parents:
diff changeset
1087 }
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jlarmour
parents:
diff changeset
1088
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parents:
diff changeset
1089 //-----------------------------------------------------------------------------
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diff changeset
1090 // Set starting address of stack. Whether this is at the start or end of
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
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parents:
diff changeset
1091 // the memory block allocated for the stack depends on whether the stack
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jlarmour
parents:
diff changeset
1092 // grows up or down.
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parents:
diff changeset
1093
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diff changeset
1094 externC int pthread_attr_setstackaddr (pthread_attr_t *attr, void *stackaddr)
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parents:
diff changeset
1095 {
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jlarmour
parents:
diff changeset
1096 PTHREAD_ENTRY();
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jlarmour
parents:
diff changeset
1097
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jlarmour
parents:
diff changeset
1098 PTHREAD_CHECK(attr);
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jlarmour
parents:
diff changeset
1099
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parents:
diff changeset
1100 attr->stackaddr = stackaddr;
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jlarmour
parents:
diff changeset
1101 attr->stackaddr_valid = 1;
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jlarmour
parents:
diff changeset
1102
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jlarmour
parents:
diff changeset
1103 PTHREAD_RETURN(0);
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jlarmour
parents:
diff changeset
1104 }
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jlarmour
parents:
diff changeset
1105
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jlarmour
parents:
diff changeset
1106 //-----------------------------------------------------------------------------
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jlarmour
parents:
diff changeset
1107 // Get any previously set stack address.
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jlarmour
parents:
diff changeset
1108
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parents:
diff changeset
1109 externC int pthread_attr_getstackaddr (const pthread_attr_t *attr,
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jlarmour
parents:
diff changeset
1110 void **stackaddr)
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parents:
diff changeset
1111 {
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parents:
diff changeset
1112 PTHREAD_ENTRY();
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parents:
diff changeset
1113
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jlarmour
parents:
diff changeset
1114 PTHREAD_CHECK(attr);
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jlarmour
parents:
diff changeset
1115
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parents:
diff changeset
1116 if( stackaddr != NULL )
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jlarmour
parents:
diff changeset
1117 {
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jlarmour
parents:
diff changeset
1118 if( attr->stackaddr_valid )
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jlarmour
parents:
diff changeset
1119 {
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parents:
diff changeset
1120 *stackaddr = attr->stackaddr;
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jlarmour
parents:
diff changeset
1121 PTHREAD_RETURN(0);
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jlarmour
parents:
diff changeset
1122 }
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parents:
diff changeset
1123 // Stack address not set, return EINVAL.
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jlarmour
parents:
diff changeset
1124 else PTHREAD_RETURN(EINVAL);
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jlarmour
parents:
diff changeset
1125 }
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parents:
diff changeset
1126
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
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parents:
diff changeset
1127 PTHREAD_RETURN(0);
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jlarmour
parents:
diff changeset
1128 }
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diff changeset
1129
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parents:
diff changeset
1130
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parents:
diff changeset
1131 //-----------------------------------------------------------------------------
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jlarmour
parents:
diff changeset
1132 // Set minimum creation stack size.
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jlarmour
parents:
diff changeset
1133
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diff changeset
1134 externC int pthread_attr_setstacksize (pthread_attr_t *attr,
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jlarmour
parents:
diff changeset
1135 size_t stacksize)
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jlarmour
parents:
diff changeset
1136 {
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jlarmour
parents:
diff changeset
1137 PTHREAD_ENTRY();
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jlarmour
parents:
diff changeset
1138
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jlarmour
parents:
diff changeset
1139 PTHREAD_CHECK(attr);
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jlarmour
parents:
diff changeset
1140
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jlarmour
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diff changeset
1141 CYG_ASSERT( stacksize > PTHREAD_STACK_MIN, "Inadequate stack size supplied");
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jlarmour
parents:
diff changeset
1142
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jlarmour
parents:
diff changeset
1143 // Reject inadequate stack sizes
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jlarmour
parents:
diff changeset
1144 if( stacksize < PTHREAD_STACK_MIN )
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jlarmour
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diff changeset
1145 PTHREAD_RETURN(EINVAL);
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parents:
diff changeset
1146
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diff changeset
1147 attr->stacksize_valid = 1;
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jlarmour
parents:
diff changeset
1148 attr->stacksize = stacksize;
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parents:
diff changeset
1149
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jlarmour
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diff changeset
1150 PTHREAD_RETURN(0);
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jlarmour
parents:
diff changeset
1151 }
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diff changeset
1152
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diff changeset
1153 //-----------------------------------------------------------------------------
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jlarmour
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diff changeset
1154 // Get current minimal stack size.
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jlarmour
parents:
diff changeset
1155
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diff changeset
1156 externC int pthread_attr_getstacksize (const pthread_attr_t *attr,
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jlarmour
parents:
diff changeset
1157 size_t *stacksize)
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jlarmour
parents:
diff changeset
1158 {
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jlarmour
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diff changeset
1159 PTHREAD_ENTRY();
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jlarmour
parents:
diff changeset
1160
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jlarmour
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diff changeset
1161 PTHREAD_CHECK(attr);
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jlarmour
parents:
diff changeset
1162
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jlarmour
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diff changeset
1163 // Reject attempts to get a stack size when one has not been set.
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jlarmour
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diff changeset
1164 if( !attr->stacksize_valid )
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diff changeset
1165 PTHREAD_RETURN(EINVAL);
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diff changeset
1166
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diff changeset
1167 if( stacksize != NULL )
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jlarmour
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diff changeset
1168 *stacksize = attr->stacksize;
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diff changeset
1169
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jlarmour
parents:
diff changeset
1170 PTHREAD_RETURN(0);
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jlarmour
parents:
diff changeset
1171 }
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jlarmour
parents:
diff changeset
1172
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jlarmour
parents:
diff changeset
1173 //-----------------------------------------------------------------------------
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jlarmour
parents:
diff changeset
1174 // Thread scheduling controls
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jlarmour
parents:
diff changeset
1175
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jlarmour
parents:
diff changeset
1176 //-----------------------------------------------------------------------------
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jlarmour
parents:
diff changeset
1177 // Set scheduling policy and parameters for the thread
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jlarmour
parents:
diff changeset
1178
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jlarmour
parents:
diff changeset
1179 externC int pthread_setschedparam (pthread_t thread_id,
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jlarmour
parents:
diff changeset
1180 int policy,
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jlarmour
parents:
diff changeset
1181 const struct sched_param *param)
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jlarmour
parents:
diff changeset
1182 {
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jlarmour
parents:
diff changeset
1183 PTHREAD_ENTRY();
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jlarmour
parents:
diff changeset
1184
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jlarmour
parents:
diff changeset
1185 if( policy != SCHED_OTHER &&
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jlarmour
parents:
diff changeset
1186 policy != SCHED_FIFO &&
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jlarmour
parents:
diff changeset
1187 policy != SCHED_RR )
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jlarmour
parents:
diff changeset
1188 PTHREAD_RETURN(EINVAL);
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jlarmour
parents:
diff changeset
1189
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jlarmour
parents:
diff changeset
1190 PTHREAD_CHECK(param);
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jlarmour
parents:
diff changeset
1191
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jlarmour
parents:
diff changeset
1192 // The parameters seem OK, change the thread...
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jlarmour
parents:
diff changeset
1193
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diff changeset
1194 pthread_mutex.lock();
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jlarmour
parents:
diff changeset
1195
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diff changeset
1196 pthread_info *thread = pthread_info_id( thread_id );
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jlarmour
parents:
diff changeset
1197
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jlarmour
parents:
diff changeset
1198 if( thread == NULL )
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jlarmour
parents:
diff changeset
1199 {
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diff changeset
1200 pthread_mutex.unlock();
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jlarmour
parents:
diff changeset
1201 PTHREAD_RETURN(ESRCH);
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jlarmour
parents:
diff changeset
1202 }
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diff changeset
1203
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diff changeset
1204 thread->attr.schedpolicy = policy;
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jlarmour
parents:
diff changeset
1205 thread->attr.schedparam = *param;
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jlarmour
parents:
diff changeset
1206
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jlarmour
parents:
diff changeset
1207 if ( policy == SCHED_FIFO )
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jlarmour
parents:
diff changeset
1208 thread->thread->timeslice_disable();
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jlarmour
parents:
diff changeset
1209 else thread->thread->timeslice_enable();
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jlarmour
parents:
diff changeset
1210
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diff changeset
1211 thread->thread->set_priority( PTHREAD_ECOS_PRIORITY( param->sched_priority ));
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jlarmour
parents:
diff changeset
1212
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jlarmour
parents:
diff changeset
1213 pthread_mutex.unlock();
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jlarmour
parents:
diff changeset
1214
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jlarmour
parents:
diff changeset
1215 PTHREAD_RETURN(0);
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jlarmour
parents:
diff changeset
1216 }
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parents:
diff changeset
1217
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1218 //-----------------------------------------------------------------------------
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jlarmour
parents:
diff changeset
1219 // Get scheduling policy and parameters for the thread
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jlarmour
parents:
diff changeset
1220
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jlarmour
parents:
diff changeset
1221 externC int pthread_getschedparam (pthread_t thread_id,
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jlarmour
parents:
diff changeset
1222 int *policy,
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jlarmour
parents:
diff changeset
1223 struct sched_param *param)
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jlarmour
parents:
diff changeset
1224 {
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jlarmour
parents:
diff changeset
1225 PTHREAD_ENTRY();
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jlarmour
parents:
diff changeset
1226
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jlarmour
parents:
diff changeset
1227 pthread_mutex.lock();
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jlarmour
parents:
diff changeset
1228
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jlarmour
parents:
diff changeset
1229 pthread_info *thread = pthread_info_id( thread_id );
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jlarmour
parents:
diff changeset
1230
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jlarmour
parents:
diff changeset
1231 if( thread == NULL )
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jlarmour
parents:
diff changeset
1232 {
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parents:
diff changeset
1233 pthread_mutex.unlock();
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jlarmour
parents:
diff changeset
1234 PTHREAD_RETURN(ESRCH);
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jlarmour
parents:
diff changeset
1235 }
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jlarmour
parents:
diff changeset
1236
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jlarmour
parents:
diff changeset
1237 if( policy != NULL )
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jlarmour
parents:
diff changeset
1238 *policy = thread->attr.schedpolicy;
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jlarmour
parents:
diff changeset
1239
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jlarmour
parents:
diff changeset
1240 if( param != NULL )
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jlarmour
parents:
diff changeset
1241 *param = thread->attr.schedparam;
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parents:
diff changeset
1242
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parents:
diff changeset
1243 pthread_mutex.unlock();
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jlarmour
parents:
diff changeset
1244
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jlarmour
parents:
diff changeset
1245 PTHREAD_RETURN(0);
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jlarmour
parents:
diff changeset
1246 }
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jlarmour
parents:
diff changeset
1247
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jlarmour
parents:
diff changeset
1248
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jlarmour
parents:
diff changeset
1249 //=============================================================================
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jlarmour
parents:
diff changeset
1250 // Mutexes
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jlarmour
parents:
diff changeset
1251
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jlarmour
parents:
diff changeset
1252 //-----------------------------------------------------------------------------
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jlarmour
parents:
diff changeset
1253 // Mutex attributes manipulation functions
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jlarmour
parents:
diff changeset
1254
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jlarmour
parents:
diff changeset
1255 //-----------------------------------------------------------------------------
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jlarmour
parents:
diff changeset
1256 // Initialize attribute object
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jlarmour
parents:
diff changeset
1257
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jlarmour
parents:
diff changeset
1258 externC int pthread_mutexattr_init ( pthread_mutexattr_t *attr)
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jlarmour
parents:
diff changeset
1259 {
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jlarmour
parents:
diff changeset
1260 PTHREAD_ENTRY();
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jlarmour
parents:
diff changeset
1261
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jlarmour
parents:
diff changeset
1262 PTHREAD_CHECK(attr);
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jlarmour
parents:
diff changeset
1263
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jlarmour
parents:
diff changeset
1264 attr->protocol = PTHREAD_PRIO_NONE;
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jlarmour
parents:
diff changeset
1265 attr->prioceiling = 0;
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jlarmour
parents:
diff changeset
1266
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jlarmour
parents:
diff changeset
1267 PTHREAD_RETURN(0);
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jlarmour
parents:
diff changeset
1268 }
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jlarmour
parents:
diff changeset
1269
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jlarmour
parents:
diff changeset
1270 //-----------------------------------------------------------------------------
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jlarmour
parents:
diff changeset
1271 // Destroy attribute object
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jlarmour
parents:
diff changeset
1272
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jlarmour
parents:
diff changeset
1273 externC int pthread_mutexattr_destroy ( pthread_mutexattr_t *attr)
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jlarmour
parents:
diff changeset
1274 {
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jlarmour
parents:
diff changeset
1275 PTHREAD_ENTRY();
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jlarmour
parents:
diff changeset
1276
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1277 PTHREAD_CHECK(attr);
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jlarmour
parents:
diff changeset
1278
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1279 // Nothing to do here...
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jlarmour
parents:
diff changeset
1280
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1281 PTHREAD_RETURN(0);
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jlarmour
parents:
diff changeset
1282 }
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jlarmour
parents:
diff changeset
1283
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1284 //-----------------------------------------------------------------------------
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jlarmour
parents:
diff changeset
1285 // Optional functions depending on priority inversion protection options.
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jlarmour
parents:
diff changeset
1286
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jlarmour
parents:
diff changeset
1287 #if defined(_POSIX_THREAD_PRIO_INHERIT) || defined(_POSIX_THREAD_PRIO_PROTECT)
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jlarmour
parents:
diff changeset
1288
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1289 // Set priority inversion protection protocol
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jlarmour
parents:
diff changeset
1290 externC int pthread_mutexattr_setprotocol ( pthread_mutexattr_t *attr,
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jlarmour
parents:
diff changeset
1291 int protocol)
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jlarmour
parents:
diff changeset
1292 {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1293 PTHREAD_ENTRY();
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jlarmour
parents:
diff changeset
1294
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1295 PTHREAD_CHECK(attr);
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jlarmour
parents:
diff changeset
1296
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1297 switch( protocol )
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jlarmour
parents:
diff changeset
1298 {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1299 case PTHREAD_PRIO_NONE:
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jlarmour
parents:
diff changeset
1300 #if defined(_POSIX_THREAD_PRIO_INHERIT)
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jlarmour
parents:
diff changeset
1301 case PTHREAD_PRIO_INHERIT:
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jlarmour
parents:
diff changeset
1302 #endif
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jlarmour
parents:
diff changeset
1303 #if defined(_POSIX_THREAD_PRIO_PROTECT)
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jlarmour
parents:
diff changeset
1304 case PTHREAD_PRIO_PROTECT:
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jlarmour
parents:
diff changeset
1305 #endif
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jlarmour
parents:
diff changeset
1306 attr->protocol = protocol;
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jlarmour
parents:
diff changeset
1307 PTHREAD_RETURN(0);
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jlarmour
parents:
diff changeset
1308
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1309 default:
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jlarmour
parents:
diff changeset
1310 PTHREAD_RETURN(EINVAL);
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1311 }
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jlarmour
parents:
diff changeset
1312
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1313 PTHREAD_RETURN(0);
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jlarmour
parents:
diff changeset
1314 }
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jlarmour
parents:
diff changeset
1315
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1316 // Get priority inversion protection protocol
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jlarmour
parents:
diff changeset
1317 externC int pthread_mutexattr_getprotocol ( pthread_mutexattr_t *attr,
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1318 int *protocol)
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jlarmour
parents:
diff changeset
1319 {
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jlarmour
parents:
diff changeset
1320 PTHREAD_ENTRY();
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jlarmour
parents:
diff changeset
1321
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jlarmour
parents:
diff changeset
1322 PTHREAD_CHECK(attr);
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jlarmour
parents:
diff changeset
1323
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jlarmour
parents:
diff changeset
1324 if( protocol != NULL )
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jlarmour
parents:
diff changeset
1325 *protocol = attr->protocol;
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jlarmour
parents:
diff changeset
1326
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jlarmour
parents:
diff changeset
1327 PTHREAD_RETURN(0);
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jlarmour
parents:
diff changeset
1328 }
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jlarmour
parents:
diff changeset
1329
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jlarmour
parents:
diff changeset
1330 #if defined(_POSIX_THREAD_PRIO_PROTECT)
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jlarmour
parents:
diff changeset
1331
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1332 // Set priority for priority ceiling protocol
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jlarmour
parents:
diff changeset
1333 externC int pthread_mutexattr_setprioceiling ( pthread_mutexattr_t *attr,
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1334 int prioceiling)
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jlarmour
parents:
diff changeset
1335 {
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jlarmour
parents:
diff changeset
1336 PTHREAD_ENTRY();
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1337
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1338 PTHREAD_CHECK(attr);
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jlarmour
parents:
diff changeset
1339
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jlarmour
parents:
diff changeset
1340
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jlarmour
parents:
diff changeset
1341 attr->prioceiling = prioceiling;
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jlarmour
parents:
diff changeset
1342
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jlarmour
parents:
diff changeset
1343 PTHREAD_RETURN(0);
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jlarmour
parents:
diff changeset
1344 }
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jlarmour
parents:
diff changeset
1345
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1346 // Get priority for priority ceiling protocol
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jlarmour
parents:
diff changeset
1347 externC int pthread_mutexattr_getprioceiling ( pthread_mutexattr_t *attr,
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jlarmour
parents:
diff changeset
1348 int *prioceiling)
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jlarmour
parents:
diff changeset
1349 {
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jlarmour
parents:
diff changeset
1350 PTHREAD_ENTRY();
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jlarmour
parents:
diff changeset
1351
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jlarmour
parents:
diff changeset
1352 PTHREAD_CHECK(attr);
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jlarmour
parents:
diff changeset
1353
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jlarmour
parents:
diff changeset
1354 if( prioceiling != NULL )
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jlarmour
parents:
diff changeset
1355 *prioceiling = attr->prioceiling;
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jlarmour
parents:
diff changeset
1356
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1357 PTHREAD_RETURN(0);
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jlarmour
parents:
diff changeset
1358 }
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jlarmour
parents:
diff changeset
1359
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jlarmour
parents:
diff changeset
1360 // Set priority ceiling of given mutex, returning old ceiling.
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jlarmour
parents:
diff changeset
1361 externC int pthread_mutex_setprioceiling( pthread_mutex_t *mutex,
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1362 int prioceiling,
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1363 int *old_ceiling)
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jlarmour
parents:
diff changeset
1364 {
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jlarmour
parents:
diff changeset
1365 PTHREAD_ENTRY();
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jlarmour
parents:
diff changeset
1366
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jlarmour
parents:
diff changeset
1367 PTHREAD_CHECK(mutex);
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jlarmour
parents:
diff changeset
1368
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jlarmour
parents:
diff changeset
1369 pthread_mutex_lock( mutex );
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jlarmour
parents:
diff changeset
1370
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jlarmour
parents:
diff changeset
1371 Cyg_Mutex *mx = (Cyg_Mutex *)mutex;
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jlarmour
parents:
diff changeset
1372
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jlarmour
parents:
diff changeset
1373 if( old_ceiling != NULL )
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jlarmour
parents:
diff changeset
1374 *old_ceiling = mx->get_ceiling();
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1375
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1376 mx->set_ceiling( prioceiling );
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jlarmour
parents:
diff changeset
1377
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jlarmour
parents:
diff changeset
1378 pthread_mutex_unlock( mutex );
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jlarmour
parents:
diff changeset
1379
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jlarmour
parents:
diff changeset
1380 PTHREAD_RETURN(0);
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jlarmour
parents:
diff changeset
1381 }
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jlarmour
parents:
diff changeset
1382
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1383 // Get priority ceiling of given mutex
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jlarmour
parents:
diff changeset
1384 externC int pthread_mutex_getprioceiling( pthread_mutex_t *mutex,
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1385 int *prioceiling)
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1386 {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1387 PTHREAD_ENTRY();
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1388
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1389 PTHREAD_CHECK(mutex);
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jlarmour
parents:
diff changeset
1390
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jlarmour
parents:
diff changeset
1391 Cyg_Mutex *mx = (Cyg_Mutex *)mutex;
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jlarmour
parents:
diff changeset
1392
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jlarmour
parents:
diff changeset
1393 if( prioceiling != NULL )
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jlarmour
parents:
diff changeset
1394 *prioceiling = mx->get_ceiling();
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1395
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jlarmour
parents:
diff changeset
1396 PTHREAD_RETURN(0);
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1397 }
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1398
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1399 #endif // defined(_POSIX_THREAD_PRIO_PROTECT)
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jlarmour
parents:
diff changeset
1400
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1401 #endif // defined(_POSIX_THREAD_PRIO_INHERIT) || defined(_POSIX_THREAD_PRIO_PROTECT)
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1402
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1403 //-----------------------------------------------------------------------------
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jlarmour
parents:
diff changeset
1404 // Mutex functions
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1405
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1406 //-----------------------------------------------------------------------------
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jlarmour
parents:
diff changeset
1407 // Initialize mutex. If mutex_attr is NULL, use default attributes.
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1408
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1409 externC int pthread_mutex_init (pthread_mutex_t *mutex,
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1410 const pthread_mutexattr_t *mutex_attr)
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1411 {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1412 PTHREAD_ENTRY();
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1413
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1414 PTHREAD_CHECK( mutex );
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1415
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1416 pthread_mutexattr_t use_attr;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1417
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1418 // Set up the attributes we are going to use
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1419 if( mutex_attr == NULL )
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1420 pthread_mutexattr_init( &use_attr );
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1421 else use_attr = *mutex_attr;
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jlarmour
parents:
diff changeset
1422
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1423 // Now translate the POSIX protocol identifier into the eCos one.
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1424 Cyg_Mutex::cyg_protcol protocol;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1425
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1426 switch( use_attr.protocol )
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1427 {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1428 #ifdef CYGSEM_KERNEL_SYNCH_MUTEX_PRIORITY_INVERSION_PROTOCOL_CEILING
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1429 case PTHREAD_PRIO_PROTECT:
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1430 protocol = Cyg_Mutex::CEILING;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1431 break;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1432 #endif
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1433 #ifdef CYGSEM_KERNEL_SYNCH_MUTEX_PRIORITY_INVERSION_PROTOCOL_INHERIT
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1434 case PTHREAD_PRIO_INHERIT:
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1435 protocol = Cyg_Mutex::INHERIT;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1436 break;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1437 #endif
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1438 case PTHREAD_PRIO_NONE:
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jlarmour
parents:
diff changeset
1439 protocol = Cyg_Mutex::NONE;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1440 break;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1441
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1442 default:
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1443 PTHREAD_RETURN(EINVAL);
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1444 }
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1445
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1446 Cyg_Mutex *mx = new((cyg_uint8 *)mutex) Cyg_Mutex( protocol );
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1447
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1448 if ( protocol == Cyg_Mutex::CEILING )
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1449 mx->set_ceiling( use_attr.prioceiling );
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1450
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1451 PTHREAD_RETURN(0);
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1452 }
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1453
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1454 //-----------------------------------------------------------------------------
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1455 // Destroy mutex.
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1456
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1457 externC int pthread_mutex_destroy (pthread_mutex_t *mutex)
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1458 {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1459 PTHREAD_ENTRY();
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1460
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1461 int err = ENOERR;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1462
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1463 PTHREAD_CHECK( mutex );
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1464
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1465 Cyg_Mutex *mx = (Cyg_Mutex *)mutex;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1466
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1467 if( mx->get_owner() != NULL )
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1468 err = EBUSY;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1469 else mx->~Cyg_Mutex();
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1470
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1471 PTHREAD_RETURN(err);
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1472 }
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1473
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1474 //-----------------------------------------------------------------------------
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1475 // Lock mutex, waiting for it if necessary.
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1476
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1477 externC int pthread_mutex_lock (pthread_mutex_t *mutex)
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1478 {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1479 PTHREAD_ENTRY();
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1480
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1481 PTHREAD_CHECK( mutex );
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1482
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1483 Cyg_Mutex *mx = (Cyg_Mutex *)mutex;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1484
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1485 if( mx->get_owner() == Cyg_Thread::self() )
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1486 PTHREAD_RETURN(EDEADLK);
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1487
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1488 // Loop here until we acquire the mutex. Even if we are kicked out
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1489 // of the wait by a signal or release we must retry.
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1490 while( !mx->lock() )
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jlarmour
parents:
diff changeset
1491 continue;
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jlarmour
parents:
diff changeset
1492
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1493 PTHREAD_RETURN(0);
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1494 }
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1495
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1496 //-----------------------------------------------------------------------------
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1497 // Try to lock mutex.
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1498
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1499 externC int pthread_mutex_trylock (pthread_mutex_t *mutex)
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1500 {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1501 PTHREAD_ENTRY();
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1502
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1503 PTHREAD_CHECK( mutex );
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1504
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1505 Cyg_Mutex *mx = (Cyg_Mutex *)mutex;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1506
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1507 if( mx->get_owner() == Cyg_Thread::self() )
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1508 PTHREAD_RETURN(EDEADLK);
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1509
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1510 if( mx->trylock() )
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1511 PTHREAD_RETURN(0);
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1512
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1513 PTHREAD_RETURN(EBUSY);
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1514 }
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1515
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1516
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1517 //-----------------------------------------------------------------------------
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1518 // Unlock mutex.
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1519
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1520 externC int pthread_mutex_unlock (pthread_mutex_t *mutex)
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1521 {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1522 PTHREAD_ENTRY();
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1523
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1524 PTHREAD_CHECK( mutex );
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1525
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1526 Cyg_Mutex *mx = (Cyg_Mutex *)mutex;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1527
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1528 mx->unlock();
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1529
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1530 PTHREAD_RETURN(0);
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1531 }
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1532
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1533
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1534 //=============================================================================
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1535 // Condition Variables
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1536
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1537 //-----------------------------------------------------------------------------
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1538 // Attribute manipulation functions
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1539 // We do not actually support any attributes at present, so these do nothing.
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1540
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1541 //-----------------------------------------------------------------------------
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1542 // Initialize condition variable attributes
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1543
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1544 externC int pthread_condattr_init (pthread_condattr_t *attr)
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1545 {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1546 PTHREAD_ENTRY();
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1547
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1548 PTHREAD_CHECK(attr);
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1549
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1550 // There are no condition variable attributes at present
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1551
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1552 PTHREAD_RETURN(0);
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1553 }
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1554
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1555 //-----------------------------------------------------------------------------
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1556 // Destroy condition variable attributes
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1557
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1558 externC int pthread_condattr_destroy (pthread_condattr_t *attr)
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1559 {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1560 PTHREAD_ENTRY();
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1561
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1562 PTHREAD_CHECK(attr);
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1563
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1564 // nothing to do here...
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1565
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1566 PTHREAD_RETURN(0);
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1567 }
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1568
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1569 //-----------------------------------------------------------------------------
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1570 // Condition variable functions
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1571
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1572 //-----------------------------------------------------------------------------
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1573 // Initialize condition variable.
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1574
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1575 externC int pthread_cond_init (pthread_cond_t *cond,
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1576 const pthread_condattr_t *attr)
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1577 {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1578 PTHREAD_ENTRY();
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1579
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1580 PTHREAD_CHECK( cond );
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1581
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1582 Cyg_Condition_Variable *cv =
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1583 new((cyg_uint8 *)cond) Cyg_Condition_Variable();
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1584
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1585 cv = cv;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1586
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1587 PTHREAD_RETURN(0);
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1588 }
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1589
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1590 //-----------------------------------------------------------------------------
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1591 // Destroy condition variable.
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1592
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1593 externC int pthread_cond_destroy (pthread_cond_t *cond)
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1594 {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1595 PTHREAD_ENTRY();
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1596
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1597 PTHREAD_CHECK( cond );
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1598
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1599 ((Cyg_Condition_Variable *)cond)->~Cyg_Condition_Variable();
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1600
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1601 PTHREAD_RETURN(0);
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1602 }
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1603
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1604 //-----------------------------------------------------------------------------
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1605 // Wake up one thread waiting for condition variable
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1606
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1607 externC int pthread_cond_signal (pthread_cond_t *cond)
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1608 {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1609 PTHREAD_ENTRY();
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1610
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1611 PTHREAD_CHECK( cond );
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jlarmour
parents:
diff changeset
1612
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jlarmour
parents:
diff changeset
1613 ((Cyg_Condition_Variable *)cond)->signal();
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jlarmour
parents:
diff changeset
1614
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jlarmour
parents:
diff changeset
1615 PTHREAD_RETURN(0);
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jlarmour
parents:
diff changeset
1616 }
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parents:
diff changeset
1617
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jlarmour
parents:
diff changeset
1618 //-----------------------------------------------------------------------------
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jlarmour
parents:
diff changeset
1619 // Wake up all threads waiting for condition variable
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jlarmour
parents:
diff changeset
1620
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jlarmour
parents:
diff changeset
1621 externC int pthread_cond_broadcast (pthread_cond_t *cond)
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jlarmour
parents:
diff changeset
1622 {
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jlarmour
parents:
diff changeset
1623 PTHREAD_ENTRY();
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jlarmour
parents:
diff changeset
1624
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jlarmour
parents:
diff changeset
1625 PTHREAD_CHECK( cond );
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jlarmour
parents:
diff changeset
1626
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jlarmour
parents:
diff changeset
1627 ((Cyg_Condition_Variable *)cond)->broadcast();
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jlarmour
parents:
diff changeset
1628
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jlarmour
parents:
diff changeset
1629 PTHREAD_RETURN(0);
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jlarmour
parents:
diff changeset
1630 }
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parents:
diff changeset
1631
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jlarmour
parents:
diff changeset
1632 //-----------------------------------------------------------------------------
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jlarmour
parents:
diff changeset
1633 // Block on condition variable until signalled. The mutex is
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1634 // assumed to be locked before this call, will be unlocked
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parents:
diff changeset
1635 // during the wait, and will be re-locked on wakeup.
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jlarmour
parents:
diff changeset
1636
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jlarmour
parents:
diff changeset
1637 externC int pthread_cond_wait (pthread_cond_t *cond,
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jlarmour
parents:
diff changeset
1638 pthread_mutex_t *mutex)
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jlarmour
parents:
diff changeset
1639 {
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jlarmour
parents:
diff changeset
1640 PTHREAD_ENTRY();
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jlarmour
parents:
diff changeset
1641
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jlarmour
parents:
diff changeset
1642 PTHREAD_CHECK( cond );
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jlarmour
parents:
diff changeset
1643 PTHREAD_CHECK( mutex );
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jlarmour
parents:
diff changeset
1644
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parents:
diff changeset
1645 ((Cyg_Condition_Variable *)cond)->wait( *(Cyg_Mutex *)mutex );
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jlarmour
parents:
diff changeset
1646
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jlarmour
parents:
diff changeset
1647 PTHREAD_RETURN(0);
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jlarmour
parents:
diff changeset
1648 }
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parents:
diff changeset
1649
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jlarmour
parents:
diff changeset
1650 //-----------------------------------------------------------------------------
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jlarmour
parents:
diff changeset
1651 // Block on condition variable until signalled, or the timeout expires.
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jlarmour
parents:
diff changeset
1652
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jlarmour
parents:
diff changeset
1653 externC int pthread_cond_timedwait (pthread_cond_t *cond,
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jlarmour
parents:
diff changeset
1654 pthread_mutex_t *mutex,
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jlarmour
parents:
diff changeset
1655 const struct timespec *abstime)
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jlarmour
parents:
diff changeset
1656 {
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jlarmour
parents:
diff changeset
1657 PTHREAD_ENTRY();
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jlarmour
parents:
diff changeset
1658
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jlarmour
parents:
diff changeset
1659 PTHREAD_CHECK( cond );
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jlarmour
parents:
diff changeset
1660 PTHREAD_CHECK( mutex );
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jlarmour
parents:
diff changeset
1661 PTHREAD_CHECK( abstime );
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jlarmour
parents:
diff changeset
1662
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jlarmour
parents:
diff changeset
1663 cyg_tick_count ticks;
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jlarmour
parents:
diff changeset
1664 struct Cyg_Clock::converter ns_converter, sec_converter;
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parents:
diff changeset
1665
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jlarmour
parents:
diff changeset
1666 Cyg_Clock::real_time_clock->get_other_to_clock_converter( 1, &ns_converter );
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1667 Cyg_Clock::real_time_clock->get_other_to_clock_converter( 1000000000, &sec_converter );
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jlarmour
parents:
diff changeset
1668
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jlarmour
parents:
diff changeset
1669 ticks = Cyg_Clock::convert( abstime->tv_sec, &sec_converter );
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jlarmour
parents:
diff changeset
1670 ticks += Cyg_Clock::convert( abstime->tv_nsec, &ns_converter );
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jlarmour
parents:
diff changeset
1671
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jlarmour
parents:
diff changeset
1672 ((Cyg_Condition_Variable *)cond)->wait( *(Cyg_Mutex *)mutex, ticks );
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jlarmour
parents:
diff changeset
1673
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jlarmour
parents:
diff changeset
1674 PTHREAD_RETURN(0);
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jlarmour
parents:
diff changeset
1675 }
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jlarmour
parents:
diff changeset
1676
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jlarmour
parents:
diff changeset
1677 //=============================================================================
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jlarmour
parents:
diff changeset
1678 // Dynamic package initialization
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jlarmour
parents:
diff changeset
1679 // Call init_routine just the once per control variable.
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jlarmour
parents:
diff changeset
1680
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jlarmour
parents:
diff changeset
1681 externC int pthread_once (pthread_once_t *once_control,
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1682 void (*init_routine) (void))
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jlarmour
parents:
diff changeset
1683 {
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jlarmour
parents:
diff changeset
1684 PTHREAD_ENTRY();
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jlarmour
parents:
diff changeset
1685
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jlarmour
parents:
diff changeset
1686 PTHREAD_CHECK( once_control );
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jlarmour
parents:
diff changeset
1687 PTHREAD_CHECK( init_routine );
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jlarmour
parents:
diff changeset
1688
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jlarmour
parents:
diff changeset
1689 pthread_once_t old;
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jlarmour
parents:
diff changeset
1690
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jlarmour
parents:
diff changeset
1691 // Do a test and set on the once_control object.
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1692 pthread_mutex.lock();
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jlarmour
parents:
diff changeset
1693
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jlarmour
parents:
diff changeset
1694 old = *once_control;
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jlarmour
parents:
diff changeset
1695 *once_control = 1;
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jlarmour
parents:
diff changeset
1696
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jlarmour
parents:
diff changeset
1697 pthread_mutex.unlock();
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jlarmour
parents:
diff changeset
1698
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jlarmour
parents:
diff changeset
1699 // If the once_control was zero, call the init_routine().
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1700 if( !old ) init_routine();
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jlarmour
parents:
diff changeset
1701
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jlarmour
parents:
diff changeset
1702 PTHREAD_RETURN(0);
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1703 }
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jlarmour
parents:
diff changeset
1704
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1705
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1706 //=============================================================================
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jlarmour
parents:
diff changeset
1707 //Thread specific data
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jlarmour
parents:
diff changeset
1708
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jlarmour
parents:
diff changeset
1709 //-----------------------------------------------------------------------------
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jlarmour
parents:
diff changeset
1710 // Create a key to identify a location in the thread specific data area.
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1711 // Each thread has its own distinct thread-specific data area but all are
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1712 // addressed by the same keys. The destructor function is called whenever a
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1713 // thread exits and the value associated with the key is non-NULL.
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1714
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jlarmour
parents:
diff changeset
1715 externC int pthread_key_create (pthread_key_t *key,
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1716 void (*destructor) (void *))
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1717 {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1718 PTHREAD_ENTRY();
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jlarmour
parents:
diff changeset
1719
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1720 pthread_key_t k = -1;
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jlarmour
parents:
diff changeset
1721
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jlarmour
parents:
diff changeset
1722 pthread_mutex.lock();
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jlarmour
parents:
diff changeset
1723
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1724 // Find a key to allocate
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1725 for( cyg_ucount32 i = 0; i < (PTHREAD_KEYS_MAX/KEY_MAP_TYPE_SIZE); i++ )
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1726 {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1727 if( thread_key[i] != 0 )
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1728 {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1729 // We have a table slot with space available
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jlarmour
parents:
diff changeset
1730
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1731 // Get index of ls set bit.
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jlarmour
parents:
diff changeset
1732 HAL_LSBIT_INDEX( k, thread_key[i] );
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1733
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1734 // clear it
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jlarmour
parents:
diff changeset
1735 thread_key[i] &= ~(1<<k);
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jlarmour
parents:
diff changeset
1736
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1737 // Add index of word
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1738 k += i * KEY_MAP_TYPE_SIZE;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1739
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1740 // Install destructor
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jlarmour
parents:
diff changeset
1741 key_destructor[k] = destructor;
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jlarmour
parents:
diff changeset
1742
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1743 // break out with key found
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1744 break;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1745 }
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1746 }
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jlarmour
parents:
diff changeset
1747
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1748 if( k != -1 )
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1749 {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1750 // plant a NULL in all the valid thread data slots for this
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1751 // key in case we are reusing a key we used before.
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jlarmour
parents:
diff changeset
1752
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1753 for( cyg_ucount32 i = 0; i < CYGNUM_POSIX_PTHREAD_THREADS_MAX ; i++ )
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1754 {
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jlarmour
parents:
diff changeset
1755 pthread_info *thread = thread_table[i];
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jlarmour
parents:
diff changeset
1756
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1757 if( thread != NULL && thread->thread_data != NULL )
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jlarmour
parents:
diff changeset
1758 thread->thread_data[k] = NULL;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1759 }
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jlarmour
parents:
diff changeset
1760 }
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jlarmour
parents:
diff changeset
1761
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1762 pthread_mutex.unlock();
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jlarmour
parents:
diff changeset
1763
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jlarmour
parents:
diff changeset
1764 if( k == -1 ) PTHREAD_RETURN(EAGAIN);
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1765
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jlarmour
parents:
diff changeset
1766 *key = k;
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jlarmour
parents:
diff changeset
1767
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jlarmour
parents:
diff changeset
1768 PTHREAD_RETURN(0);
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jlarmour
parents:
diff changeset
1769 }
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jlarmour
parents:
diff changeset
1770
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jlarmour
parents:
diff changeset
1771 //-----------------------------------------------------------------------------
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jlarmour
parents:
diff changeset
1772 // Delete key.
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jlarmour
parents:
diff changeset
1773
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jlarmour
parents:
diff changeset
1774 externC int pthread_key_delete (pthread_key_t key)
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1775 {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1776 PTHREAD_ENTRY();
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jlarmour
parents:
diff changeset
1777
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jlarmour
parents:
diff changeset
1778 pthread_mutex.lock();
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jlarmour
parents:
diff changeset
1779
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1780 // Set the key bit to 1 to indicate it is free.
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jlarmour
parents:
diff changeset
1781 thread_key[key/KEY_MAP_TYPE_SIZE] |= 1<<(key%(KEY_MAP_TYPE_SIZE));
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jlarmour
parents:
diff changeset
1782
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jlarmour
parents:
diff changeset
1783 pthread_mutex.unlock();
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jlarmour
parents:
diff changeset
1784
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jlarmour
parents:
diff changeset
1785 PTHREAD_RETURN(0);
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jlarmour
parents:
diff changeset
1786 }
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jlarmour
parents:
diff changeset
1787
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1788 //-----------------------------------------------------------------------------
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jlarmour
parents:
diff changeset
1789 // Store the pointer value in the thread-specific data slot addressed
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1790 // by the key.
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jlarmour
parents:
diff changeset
1791
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1792 externC int pthread_setspecific (pthread_key_t key, const void *pointer)
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1793 {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1794 PTHREAD_ENTRY();
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jlarmour
parents:
diff changeset
1795
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1796 if( thread_key[key/KEY_MAP_TYPE_SIZE] & 1<<(key%KEY_MAP_TYPE_SIZE) )
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1797 PTHREAD_RETURN(EINVAL);
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jlarmour
parents:
diff changeset
1798
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1799 pthread_info *self = pthread_self_info();
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jlarmour
parents:
diff changeset
1800
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jlarmour
parents:
diff changeset
1801 if( self->thread_data == NULL )
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jlarmour
parents:
diff changeset
1802 {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1803 // Allocate the per-thread data table
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jlarmour
parents:
diff changeset
1804 self->thread_data =
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1805 (void **)self->thread->increment_stack_limit(
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1806 PTHREAD_KEYS_MAX * sizeof(void *) );
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jlarmour
parents:
diff changeset
1807
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1808 // Clear out all entries
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1809 for( int i = 0; i < PTHREAD_KEYS_MAX; i++ )
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1810 self->thread_data[i] = NULL;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1811 }
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jlarmour
parents:
diff changeset
1812
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1813 self->thread_data[key] = (void *)pointer;
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jlarmour
parents:
diff changeset
1814
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jlarmour
parents:
diff changeset
1815 PTHREAD_RETURN(0);
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jlarmour
parents:
diff changeset
1816 }
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jlarmour
parents:
diff changeset
1817
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1818 //-----------------------------------------------------------------------------
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jlarmour
parents:
diff changeset
1819 // Retrieve the pointer value in the thread-specific data slot addressed
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jlarmour
parents:
diff changeset
1820 // by the key.
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jlarmour
parents:
diff changeset
1821
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1822 externC void *pthread_getspecific (pthread_key_t key)
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1823 {
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jlarmour
parents:
diff changeset
1824 void *val;
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jlarmour
parents:
diff changeset
1825 PTHREAD_ENTRY();
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jlarmour
parents:
diff changeset
1826
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1827 if( thread_key[key/KEY_MAP_TYPE_SIZE] & 1<<(key%KEY_MAP_TYPE_SIZE) )
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1828 PTHREAD_RETURN(NULL);
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jlarmour
parents:
diff changeset
1829
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jlarmour
parents:
diff changeset
1830 pthread_info *self = pthread_self_info();
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jlarmour
parents:
diff changeset
1831
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jlarmour
parents:
diff changeset
1832 if( self->thread_data == NULL )
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jlarmour
parents:
diff changeset
1833 val = NULL;
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jlarmour
parents:
diff changeset
1834 else val = self->thread_data[key];
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jlarmour
parents:
diff changeset
1835
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jlarmour
parents:
diff changeset
1836 PTHREAD_RETURN(val);
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jlarmour
parents:
diff changeset
1837 }
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jlarmour
parents:
diff changeset
1838
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jlarmour
parents:
diff changeset
1839 //=============================================================================
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jlarmour
parents:
diff changeset
1840 // Thread Cancellation Functions
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jlarmour
parents:
diff changeset
1841
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1842 //-----------------------------------------------------------------------------
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jlarmour
parents:
diff changeset
1843 // Set cancel state of current thread to ENABLE or DISABLE.
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1844 // Returns old state in *oldstate.
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1845
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1846 externC int pthread_setcancelstate (int state, int *oldstate)
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1847 {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1848 PTHREAD_ENTRY();
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1849
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1850 if( state != PTHREAD_CANCEL_ENABLE &&
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1851 state != PTHREAD_CANCEL_DISABLE )
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1852 PTHREAD_RETURN(EINVAL);
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jlarmour
parents:
diff changeset
1853
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1854 pthread_mutex.lock();
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1855
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1856 pthread_info *self = pthread_self_info();
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1857
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1858 if( oldstate != NULL ) *oldstate = self->cancelstate;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1859
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1860 self->cancelstate = state;
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jlarmour
parents:
diff changeset
1861
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1862 pthread_mutex.unlock();
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1863
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1864 // Note: This function may have made it possible for a pending
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1865 // cancellation to now be delivered. However the standard does not
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1866 // list this function as a cancellation point, so for now we do
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1867 // nothing. In future we might call pthread_testcancel() here.
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1868
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1869 PTHREAD_RETURN(0);
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1870 }
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jlarmour
parents:
diff changeset
1871
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1872 //-----------------------------------------------------------------------------
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1873 // Set cancel type of current thread to ASYNCHRONOUS or DEFERRED.
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1874 // Returns old type in *oldtype.
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1875
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1876 externC int pthread_setcanceltype (int type, int *oldtype)
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1877 {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1878 PTHREAD_ENTRY();
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1879
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1880 if( type != PTHREAD_CANCEL_ASYNCHRONOUS &&
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1881 type != PTHREAD_CANCEL_DEFERRED )
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1882 PTHREAD_RETURN(EINVAL);
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jlarmour
parents:
diff changeset
1883
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1884 pthread_mutex.lock();
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1885
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1886 pthread_info *self = pthread_self_info();
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1887
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1888 if( oldtype != NULL ) *oldtype = self->canceltype;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1889
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1890 self->canceltype = type;
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jlarmour
parents:
diff changeset
1891
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1892 pthread_mutex.unlock();
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1893
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1894 // Note: This function may have made it possible for a pending
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1895 // cancellation to now be delivered. However the standard does not
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1896 // list this function as a cancellation point, so for now we do
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1897 // nothing. In future we might call pthread_testcancel() here.
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1898
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
diff changeset
1899 PTHREAD_RETURN(0);
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents:
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1900 }
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1901
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1902 //-----------------------------------------------------------------------------
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1903 // Cancel the thread.
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1904
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1905 externC int pthread_cancel (pthread_t thread)
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1906 {
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1907 PTHREAD_ENTRY();
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1908
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1909 pthread_mutex.lock();
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1910
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1911 pthread_info *th = pthread_info_id(thread);
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1912
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1913 if( th == NULL )
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1914 {
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1915 pthread_mutex.unlock();
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1916 PTHREAD_RETURN(ESRCH);
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1917 }
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1918
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1919 th->cancelpending = true;
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1920
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1921 if( th->cancelstate == PTHREAD_CANCEL_ENABLE &&
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1922 th->canceltype == PTHREAD_CANCEL_ASYNCHRONOUS )
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1923 {
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1924 // If the thread has cancellation enabled, and it is in
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1925 // asynchronous mode, set the eCos thread's ASR pending to
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1926 // deal with it when the thread wakes up. We also release the
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1927 // thread out of any current wait to make it wake up.
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1928
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1929 th->thread->set_asr_pending();
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1930 th->thread->release();
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1931 }
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1932 // Otherwise the thread either has cancellation disabled, or is
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1933 // in deferred mode. In either case it is up to the thread to
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1934 // get into a state to deal with the pending cancellation.
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1935
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1936 pthread_mutex.unlock();
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1937
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1938
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1939 PTHREAD_RETURN(0);
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1940 }
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1941
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1942 //-----------------------------------------------------------------------------
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1943 // Test for a pending cancellation for the current thread and terminate
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1944 // the thread if there is one.
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1945
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1946 externC void pthread_testcancel (void)
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1947 {
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1948 PTHREAD_ENTRY_VOID();
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1949
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1950 pthread_info *self = pthread_self_info();
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1951
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1952 // Check whether there is a cancel pending and if so, whether
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1953 // cancellations are enabled. We do it in this order to reduce the
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1954 // number of tests in the common case - when no cancellations are
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1955 // pending.
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1956
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1957 if( self->cancelpending &&
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1958 self->cancelstate == PTHREAD_CANCEL_ENABLE )
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1959
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1960 {
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1961 // If we have cancellation enabled, and there is a cancellation
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1962 // pending, then go ahead and do the deed.
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1963
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1964 // Exit now with special retval. pthread_exit() calls the
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1965 // cancellation handlers implicitly.
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1966 pthread_exit(PTHREAD_CANCELED);
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1967 }
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1968
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1969 PTHREAD_RETURN_VOID;
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1970 }
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1971
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1972 //-----------------------------------------------------------------------------
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1973 // These two functions actually implement the cleanup push and pop functionality.
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1974
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1975 externC void pthread_cleanup_push_inner (struct pthread_cleanup_buffer *buffer,
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1976 void (*routine) (void *),
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1977 void *arg)
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1978 {
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1979 PTHREAD_ENTRY();
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1980
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1981 pthread_info *self = pthread_self_info();
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1982
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1983 buffer->routine = routine;
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1984 buffer->arg = arg;
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1985
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1986 buffer->prev = self->cancelbuffer;
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1987
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1988 self->cancelbuffer = buffer;
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1989
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1990 return;
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1991 }
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1992
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1993 externC void pthread_cleanup_pop_inner (struct pthread_cleanup_buffer *buffer,
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1994 int execute)
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1995 {
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1996 PTHREAD_ENTRY();
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1997
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1998 pthread_info *self = pthread_self_info();
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1999
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2000 CYG_ASSERT( self->cancelbuffer == buffer, "Stacking error in cleanup buffers");
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2001
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2002 if( self->cancelbuffer == buffer )
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2003 {
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2004 // Remove the buffer from the stack
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2005 self->cancelbuffer = buffer->prev;
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2006 }
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2007 else
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2008 {
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2009 // If the top of the stack is not the buffer we expect, do not
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2010 // execute it.
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2011 execute = 0;
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2012 }
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2013
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2014 if( execute ) buffer->routine(buffer->arg);
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2015
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2016 return;
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2017 }
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2018
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2019
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2020 // -------------------------------------------------------------------------
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2021 // EOF pthread.cxx